کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6609576 | 459549 | 2016 | 44 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Tailoring the pseudocapacitive behavior of electrochemically deposited manganese-nickel oxide films
ترجمه فارسی عنوان
رفتار شبیه سازی از فیلم های اکسید منگنز نیکل ذخیره شده الکتروشیمیایی
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کلمات کلیدی
مخزن سوپر اکسید منگنز، اکسید نیکل، الکترود زندگی چرخه،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
چکیده انگلیسی
Manganese-nickel mixed oxide thin films were deposited by anodic electrodeposition on stainless steel substrate from an acetate solution using a potentiodynamic technique, at scan rate of 100 mV sâ1 and room temperature. The effect of electrolyte pH, varied in the range from 4 to 7, on composition, morphology and capacitance behavior of oxide thin films was investigated. The nickel content in the oxide increased with increasing deposition pH, allowing to investigate the effect of the oxide composition on the capacitive behavior of as-grown manganese-nickel mixed oxides. Oxide films deposited from the electrolyte at pH 6, having a composition close to Ni0.10Mn0.90Ox showed the highest specific capacitance and the lowest charge transfer resistance. After annealing, the oxide had a complex structure of composite nature, consisting of intermixed amorphous and nanocrystalline phases. A birnessite type oxide with turbostratic disorder was identified as the major phase, in the presence of nickel hydroxide as a finely dispersed second phase. Annealing caused a drastic reduction of the charge transfer resistance and a limited increase of the specific capacitance, probably as the result of diverging effects on oxide properties, i.e. enhanced conductivity and porosity sintering. Cycle life testing of this material revealed a 25% increase of the specific capacitance over 5,000 cycles to a final value of 225 F gâ1 (1 M Na2SO4, 50 mV sâ1, 0.11 mg cmâ2 mass loading).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 190, 1 February 2016, Pages 636-647
Journal: Electrochimica Acta - Volume 190, 1 February 2016, Pages 636-647
نویسندگان
Mohammad H. Tahmasebi, Keyvan Raeissi, Mohammad A. Golozar, Antonello Vicenzo, Mazdak Hashempour, Massimiliano Bestetti,